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[JOHN <question669986@xxxxxxxxxxxxxxxxxxxxx>]

New question #669986 on Yade:
https://answers.launchpad.net/yade/+question/669986

Good evening,
I was wondering, how are interactions calculated?
I dug into the trunk code and found this in InteractionContainer.cpp


void InteractionContainer::postLoad__calledFromScene(const shared_ptr<BodyContainer>& bb){
	bodies=&bb->body;
	clear();
	FOREACH(const shared_ptr<Interaction>& I, interaction){ 
		Body::id_t id1=I->getId1(), id2=I->getId2();
		if (!(*bodies)[id1] || !(*bodies)[id2]) {
			return;
		} else {
			insert(I);
		}
	}
	interaction.clear();
}



But i dont really understand this line 		if (!(*bodies)[id1] || !(*bodies)[id2]) {

and i am not sure it is even relevant
Thanks in advance
John




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